Abstract
A number of results are proved concerning non-real zeros of derivatives of real and strictly non-real meromorphic functions in the plane.
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Langley, J.K. Non-real zeros of derivatives of meromorphic functions. JAMA 133, 183–228 (2017). https://doi.org/10.1007/s11854-017-0031-6
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DOI: https://doi.org/10.1007/s11854-017-0031-6